Scientific American29 天
NASA’s Hubble Space Telescope Was Never Meant to Look at the Sun. Astronomers Tried It Anyway
A little-known chapter of the Hubble Space Telescope’s history is a reminder of the risks of looking at the sun ...
Chances of asteroid striking Earth in the next decade has nearly doubled, NASA says
The chances of an asteroid striking Earth within the next decade has doubled in a matter of weeks, according to NASA ...